Headlight.



R. M. DOOLEY.

HEADLIGHT.

APPLICATION FILED JAN 27, 1910.

Patented 0015.531, 1911.

INVENTOR WITNESSES. L5

HIQRNE rs UNITED STATES PATENT-OFFICE.

ROBERT M. DOOLEY, OI IROCKLAND, TEXAS;

HEADLIGHT.

1 ,oomssg Specification of Letters Patent.-

Patented Oct. 31, 1911.

application filed January 27, 1910. Serial No. 549,310.

To all whom it may concern: v

"Be it-known that I. Rossin i1. DOOLEY, citizen of the'United States, residing at Rockl and, in the county of Tyler and State of Texas, have invented certain new and useful Improvements in l-l-cadlights, of which the followil'lgis a specification.

My invention relates to new and :Itseful improvements to headlights and mor partieularly'to electric head-lights.

'lhcobject. ofmy invention is to provide an electric head-light which will adjust the .carbons of the arc lamp without the usual turesot' construction and operation, an example-tot which is described in the following specification and illustrated in the accompanying drawings, wherein:

Figure 1. is a vertical section of my dc.- vicc, and Fig. 2. is a plan view of the are lamp.

In the drawings the numeral 1 designates a-suitablc housing, and numeral 2 designates a central'stand on wh ch a tubular supporting member 3 is.mounted to slide up or down. This movement is regulated by nuts 4 arranged to turn on a bolt 5 mounted on the base of the stand l. The tubular member carries an arm (3 near its lower extremity which is provided with a 'set screw 7 adapted to engage with a :arbon 8. At the top of the tubular member an arm 9 extends over the-arm 6 and carries a vertical sleeve 10 which-is insulated therefrom by anon-conducting collar'll. I I

A suitable binding post- 12 is arranged on the sleeve while another sleeve 14 is arranged to slide in the first named sleeve and to engage with a carbon 15. Normally the carbons S and 15 contact. at-a point directly opposite the center of the reflector 16 and the lens 17.

Solenoids l8 and [9 are mounted within the tubular member and have electrical conncction with the lead wire 20. and ar connected up in circuit with the upper carbon 15 by the conductor 21, which is secured to the binding post '12 of the sleeve heretofore described. The frame of the'lamp is con net-ted to the lead' wire 20 below the lead 20, the lower carbon being in circuit there-' with through the carrying arm (3. These solenoids are so positioned that "upon being energ'iY-ed. the cores 23 thereof will be moved upwardly raisingthe arm-94" and one end of the lever which latter is pivoted at 26.

'lhe'other end of the lever engages with one end of a lever 27 pivotally mounted on the tubular member. The other end of the lever 27 engages with a link :28 whicheX- tt-nds downward through an aperturelQ in I the arm 9 and connects to a' ring 30. The

riu engages the carbon on-its upward 7 movement, bu will slide down without cn-- gag-inewith the carbon. v

. llctwcen the solenoids 18 and 19 a dashpot ill ismountcd receive a piston 32 connected in alincment with the arm 24. it so lever 33 extends downward from the end of 1 ever -5 ant connee s wi 1- 0 lie I l t tl one enl f 'a lever 34 which is pivoted belowthe support of themagnets.

A spring 3:") having connection with the 3 other end of the lever 34 extends downward and has connect-Ion with :1 lug 36 made on 'the interior of the tubular member and is made adjustable by a nut- 37. This nut may be reached by the operator through an 3]):

erture 38 in the tubular member.

When the carbons are close together the resistance is at a minimum and the solenoid coils will be energized enough to raise the electrode 15' against the tension of the spring '95 35. As the electrode is raised .the resistance is increased and-"energy exerted by the solenoids 1s decreasednntil 1t 15 neutralized by .the tension of the sprin lVhen the electrodes are further separated by reason of their. being burned away the spring will overcome the actimi of the solenoids and then the dash pot; and the electrode will be returned to itsnormal position.

It is. obvious that an arc lamp so eonstructed can be installed ,in places where, the space is very limited and that the mechanism being inside of the stand will be pro tected and will not. beliable to' get out of adjustment All the lovers used in the mechanism being short and the mcrhauiszn being eompact'decreases the liability 01 the 2 j v v 1,007,435

' electrodes being aflected by .vibration should I the lamp be used as a headlight 'ona' mo'v ing vehicle.

' whatIclaimiszy. v w 1. In an electric headlight, the combination with a base, of a -tubular stand suported on the base, means for raising or owering the stand with relation to the base,

an arm arranged near Lthe lower extremity '10 of the stand adapted to support an electrode,

a second arm arranged attlie upper extremity of the stand, a sleeve fixed in the last '1 na'med arm and insulated therefrom, a second sleeve arranged to .slide the'first named sleeve and .to support an'electi'ode, a ring clutch adapted to surround the lastnamed electrode, alever pivoted on the stand, a link connecting one end of said lever tv'ith thering clutch, two opposite verti 20 cal solenoids supported Within the stand,

cores arranged "to operate in'the solenoids [and adapted to have upward movement upon the energizing of said solenoids, a sec-- ond lever pivoted upon said stand between and pivot-ally connected to the free end of said first na'riled'lever and said cores, a horizontal levei'lpiyotedi beneath said solenoids, a vertical link extending parallel to'the soleneids and pivoted to the pivotal point of connectionbetween the first'named levers and the inner end of said horizontal lever, a spring concealed within the stand and secured to the free outer end of the horizontal lever, and means for adjusting the tension 3 of said spring. J

2. In an electric'headlight, the combina-' tion with a' base, of a tubular stand sup ported on the base, means for raising orlowering the stand with'relation to the base,

: an arm arranged near the lower extremity :of stand adapted to support an elec- 'trode, a second armiarrann'ed at the upper extremity of the stand, a sleeve fixed in the last named arm and insulated therefrom, a

second sleeve arranged to slide in the-first ond lever pivotedupon said stand between and 'pivotally connected to the free end of said first named lever' and said cores, a horizontal lever pivoted beneath said solenoids, a vertical link extending parallel to the solenoids and pivoted to the-pivotal point .of connection between the first named levers =andthe inner end of Stildd'lOl'lZOIl-till lever,

a spring concealedvwithin the stand and's'ecured to the free outer end of the horizontal lever, means for adjusting the tension of 455 said spring, a dash pot positioned-between said solenoids and operatively connected with said second named'lever, said solenoid cores being adapted for upward movement upon the energizing of said solenoids, and said 79 solenoids, electrodes and arms adapted forthe passing of an electrode oircuit t-here-' through.

In testimony -whereof I have signed my name to this specification in the presence of two subscribing witnesses. ROBERT M. DOOLEY. 'Witnejsses J. F. CAn'rnn, N. H. CARTER. 

